Double-wishbone independent suspension distributed driving steering axle

Abstract

A double-wishbone independent suspension distributed driving steering axle comprises a left wheel edge driving system and a right wheel edge driving system which are in bilateral symmetry, the left wheel edge driving system and the right wheel edge driving system each comprise a steering knuckle, an upper master pin and a lower master pin, the upper master pins are installed on the upper portions of the steering knuckles and used for installing upper swing arms, and the lower master pins are installed on the lower portions of the steering knuckles and used for installing lower swing arms. The lower main pin is mounted at the lower part of the steering knuckle and is used for mounting the lower swing arm; each upper main pin is provided with two air bags bearing vertical force. A steering knuckle arm is installed on the lower portion of each steering knuckle, each steering knuckle arm is connected with a steering rocker arm through a steering tie rod, each steering rocker arm is rotatably connected to a vehicle body, and a left steering rocker arm and a right steering rocker arm are connected through a steering middle rod to form a steering trapezoidal structure. A shock absorber is mounted on each lower main pin; the left lower swing arm and the right lower swing arm are connected through a stabilizing rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile suspension, and in particular relates to a double-wishbone independent suspension distributed drive steering axle. Background Art

[0002] Automobile suspension is an important component to ensure ride comfort. At the same time, as a force-transmitting component connecting the frame and the axle, automobile suspension is also an important component to ensure automobile driving safety. Therefore, automobile suspension is often listed as an important component in the technical specifications of the car as one of the indicators to measure the quality of the car.

[0003] Currently, existing rubber-tyred trackless guided vehicles (RTGs) use a mid-drive solution, with drive only on the forward and rear axles. Existing mid-drive products take up a lot of space and are heavy. They also suffer from poor dynamics and, due to road adhesion limitations, have only two drive axles, preventing them from expanding into longer train formations. Furthermore, the large volume occupied by the mid-drive system prevents a 100% low-floor layout. Furthermore, existing products utilize a rigid axle, are heavy, and offer poor comfort. The existing independent suspension has poor load-bearing capacity, failing to meet the high-load requirements of trackless guided vehicles. Summary of the Invention

[0004] In order to solve the above-mentioned problems existing in the existing technology, the utility model provides a double-wishbone independent suspension distributed drive steering axle with small footprint, light system weight, good comfort, high vehicle maneuverability, large channel width, large load capacity, and can be applied to trackless rubber-tyred trains to achieve 100% low-floor layout.

[0005] The technical solution adopted in this utility model is:

[0006] A double wishbone independent suspension distributed drive steering axle includes a left wheel drive system and a right wheel drive system that are symmetrical on both sides. The left wheel drive system and the right wheel drive system both include a steering knuckle, an upper kingpin and a lower kingpin. The upper kingpin is installed on the upper part of the steering knuckle and is used to install an upper swing arm, and the lower kingpin is installed on the lower part of the steering knuckle and is used to install a lower swing arm; each of the upper kingpins is installed with two air bags that withstand vertical force; the lower part of each steering knuckle is installed with a steering knuckle arm, the steering knuckle arm is connected to the steering rocker arm through a steering tie rod, each of the steering rocker arms is rotatably connected to the vehicle body, the left steering rocker arm and the right steering rocker arm are connected through a steering intermediate rod to form a steering trapezoidal structure; each of the lower kingpins is installed with a shock absorber; the left lower swing arm and the right lower swing arm are connected through a stabilizer bar.

[0007] Furthermore, after being mounted on the steering knuckle, the upper and lower kingpins are connected by kingpin reinforcement plates on both sides to form an integral structure. The upper and lower kingpins of the present utility model are connected by the kingpin reinforcement plates to form an integral structure, thereby enhancing the rigidity of the upper and lower kingpins and improving the reliability of the entire system.

[0008] Furthermore, the upper kingpin has a horizontally arranged first pin hole for installing the upper swing arm; the upper kingpin has a first kingpin shaft for connecting with the upper pin hole of the steering knuckle, and the first kingpin shaft and the first pin hole are arranged vertically; the upper kingpin has a first mounting hole for installing an elastic element, and the movement trajectory of the lower end of the elastic element in the YZ plane is consistent with the movement trajectory of the steering knuckle; the upper kingpin has a first mounting surface for connecting with the kingpin reinforcement plate, and a plurality of first connecting holes are arranged on the first mounting surface.

[0009] Furthermore, the lower kingpin has a horizontally arranged second pin hole for installing the lower control arm; the lower kingpin has a second kingpin shaft for connecting with the lower pin hole of the steering knuckle, the second kingpin shaft and the second pin hole are vertically arranged, and the lower pin hole and the upper pin hole are coaxially arranged; the lower kingpin has a second mounting hole for installing the shock absorber; the lower kingpin has a second mounting surface for connecting with the kingpin reinforcement plate, and a plurality of second connecting holes are arranged on the second mounting surface.

[0010] Furthermore, the left wheel drive system and the right wheel drive system also include a motor, a reducer, a wheel hub assembly, and a brake. The wheel hub assembly is installed on the steering knuckle, the motor is connected to the reducer, and the reducer is fixedly connected to the steering knuckle. The reducer is connected to the wheel hub through a half-shaft to realize power transmission. The motor and the reducer are arranged in the space between the upper kingpin and the lower kingpin; the brake is fixed on the steering knuckle, and the brake cooperates with the brake disc on the wheel hub to realize the braking function.

[0011] Furthermore, the motor is provided with an interface for outputting the wires obliquely upward, and the wiring method of the motor adopts an oblique upward output method, which reduces the envelope space of the three wiring harnesses of the motor when turning.

[0012] Furthermore, a reinforcement plate is installed on the steering knuckle to improve the rigidity of the steering knuckle, so that the steering knuckle can bear a larger load.

[0013] Furthermore, the left wheel drive system and the right wheel drive system both include a liquid storage tank, which is installed on the reinforcing plate. The liquid storage tank is connected to the reducer through an oil pipe and is installed above the installation position of the reducer, which can effectively prevent the escape of oil and gas.

[0014] Furthermore, the reducer includes a case cover, a gear frame, a driving wheel, a driven wheel, a sun gear, planetary gears, a planetary gear shaft, a planetary frame, and an inner ring gear. The driving wheel and the driven wheel are both installed on the case cover and the gear frame. The driving wheel and the driven wheel are meshed and connected. The sun gear is connected to the driven wheel. The planetary frame is installed on the driven wheel. The planetary gears are installed on the planetary frame through the planetary gear shaft. The planetary gears are meshed with the sun gear. The inner ring gear is fixed on the steering knuckle. The planetary gears are meshed with the inner ring gear to drive the planetary frame to rotate. The planetary frame is connected to the half shaft.

[0015] Furthermore, there are two upper swing arms, both of which are installed in the first pin hole of the upper kingpin through the upper swing arm pin shaft. The upper swing arm includes a swing arm, and the swing arm and the upper swing arm pin shaft are connected through a combined elastic bushing. The combined elastic bushing includes an elastic bushing, and the elastic bushing is pressed into the swing arm hole. The upper swing arm pin shaft is installed in the inner hole of the elastic bushing and an oil seal is provided between the upper swing arm and the elastic bushing. The upper swing arm pin shaft is provided with an oil channel for lubricating the bearing.

[0016] Beneficial effects of the utility model:

[0017] 1. By distributing the upper and lower kingpins, space is created between them for the motor and reducer, integrating the drive system while achieving steering, reducing system space and weight. By connecting the upper and lower kingpins into a single unit at the kingpin reinforcement plate, the kingpin's rigidity and the reliability of the kingpin bearing are enhanced, making it possible for the independent suspension with steering to achieve a load capacity of over 9 tons.

[0018] 2. Through the setting of steering rocker arm, steering intermediate tie rod and steering tie rod, the steering of left and right wheels is realized and the Ackerman angle relationship is met.

[0019] 3. The three-phase outgoing wires of the motor are arranged obliquely upward, which reduces the envelope space when the three-phase of the motor is turned, making the distributed drive belt turning possible.

[0020] 4. The dual airbags and the structure of installing them on the kingpin through the airbag arms make the airbag mounting point mainly move vertically, with a smaller swing amount, which improves the load-bearing capacity. It also makes it possible to set a shorter upper swing arm, increasing the channel width between the left and right upper swing arms.

[0021] 5. The setting of the reinforcement plate: By setting the reinforcement plate on the steering knuckle, the rigidity of the steering knuckle is increased, so that the system has a higher load-bearing capacity, and the load-bearing capacity can be ≥9 tons.

[0022] 6. The setting of the liquid storage tank. By setting the liquid storage tank to connect with the reducer, when the reducer is heated and exhausted, the oil and gas enter the higher-positioned liquid storage tank through the oil pipe. Since the liquid storage tank is located higher and farther away from the reducer, the oil and gas condense after hitting the wall of the liquid storage tank after entering, and the oil flows back through the oil pipe, effectively preventing the oil and gas from escaping.

[0023] 7. Integrated reducer: The reducer integrates a single-stage parallel shaft reducer and a planetary gear reducer, effectively reducing the size of the reducer.

[0024] 8. Based on the finite element optimized steering knuckle structure, the steering structure undergoes finite element analysis based on the force, and different reinforcement ribs are set to ensure structural strength and rigidity while reducing weight.

[0025] 9. The combined bushing structure of the upper swing arm allows the upper swing arm to rotate around the pin shaft as a set without angle restriction, making it possible to shorten the distance between the two pin holes of the upper swing arm, thereby effectively increasing the channel width between the left and right upper swing arms of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the present utility model.

[0027] Figure 2 This is a schematic diagram of the main structure of the right wheel side drive system of the present utility model.

[0028] Figure 3 This is a schematic diagram of the main structure of the left wheel side drive system of the present invention.

[0029] Figure 4 This is a schematic diagram of the connection structure of the upper and lower kingpins of the utility model.

[0030] Figure 5 It is a structural schematic diagram of the upper kingpin of the utility model.

[0031] Figure 6 It is a structural schematic diagram of the lower kingpin of the utility model.

[0032] Figure 7 This is a schematic structural diagram of the reducer of the present utility model.

[0033] Figure 8 It is a structural schematic diagram of the upper swing arm of the utility model.

[0034] Figure 9 It is a schematic cross-sectional structural diagram of the upper swing arm of the present utility model.

[0035] Figure 10 It is a structural schematic diagram of the left steering knuckle and the right steering knuckle of the present utility model.

[0036] In the figure: 1. Left wheel drive system; 2. Right wheel drive system; 3. Airbag; 4. Steering knuckle arm; 5. Steering tie rod; 6. Steering rocker arm; 7. Steering intermediate rod; 8. Stabilizer bar; 9. Shock absorber;

[0037] 11. Steering knuckle; 111. Upper pin hole; 112. Lower pin hole; 12. Upper kingpin; 121. First pin hole; 122. First kingpin shaft; 123. First mounting hole; 124. First mounting surface; 125. First connecting hole; 13. Lower kingpin; 131. Second pin hole; 132. Second kingpin shaft; 133. Second mounting hole; 134. Second mounting surface; 135. Second connecting hole; 14. Upper swing arm; 141. Upper swing arm pin; 142. Swing arm; 143. Elastic bushing; 144. Oil seal; 145. Oil channel; 15. Lower arm; 151. Lower arm pin; 16. Kingpin reinforcement plate; 17. Motor; 171. Interface; 18. Wheel hub assembly; 19. Reducer; 191. Case cover; 192. Gear rack; 193. Driving wheel; 194. Driven wheel; 195. Sun gear; 196. Planetary gear; 197. Planetary rack; 198. Ring gear; 20. Axle shaft; 21. Reinforcement plate; 22. Fluid reservoir; 23. Brake. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention encompasses all possible alternatives, improvements, and equivalents within the scope of the claims.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more, unless otherwise clearly defined.

[0040] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] See also Figure 1-10This embodiment provides a double wishbone independent suspension distributed drive steering axle, including a left wheel drive system 1 and a right wheel drive system 2 that are symmetrical. The left wheel drive system 1 and the right wheel drive system 2 each include a steering knuckle 11, an upper kingpin 12, and a lower kingpin 13. The upper kingpin 12 is mounted on the upper portion of the steering knuckle 11 and is used to mount an upper swing arm 14. The lower kingpin 13 is mounted on the lower portion of the steering knuckle 11 and is used to mount a lower swing arm 15. Each of the upper kingpins 11 is mounted with two airbags 3 for bearing vertical forces. The lower portion of each steering knuckle 11 is mounted with a steering knuckle arm 4, which is connected to a steering rocker arm 6 via a steering tie rod 5. Each steering rocker arm 6 is rotatably connected to the vehicle body. The left and right steering rocker arms are connected via a steering intermediate rod 7 to form a steering trapezoidal structure. Each of the lower kingpins 13 is mounted with a shock absorber 9. The left and right lower swing arms are connected via a stabilizer bar 8. Specifically, two airbags 3 are bolted to airbag arms 31, which are bolted to the upper kingpins 12 of the left and right wheel drive systems to withstand vertical forces. A steering knuckle arm 4 is bolted to the steering knuckle 11 of the left and right wheel drive systems. A steering tie rod 5 is connected to the steering knuckle arm 4. The other end of the steering tie rod 5 is connected to a steering rocker arm 6. The steering rocker arm 6 is fixed to the vehicle body via a bracket and can rotate around the fixed bracket. A steering intermediate tie rod 7 connects the left and right steering rocker arms to form a steering trapezoidal mechanism, ensuring that the left and right wheels meet the Ackerman angle relationship during steering, achieving the steering function. A shock absorber 9 is bolted to the lower kingpin 13. A stabilizer bar 7 is bolted to the lower control arm 15 of the left and right wheel drive systems.

[0043] After being installed on the steering knuckle 11, the upper kingpin 12 and lower kingpin 13 of this embodiment are connected by a kingpin reinforcement plate 16 to form a single unitary structure. This integral connection of the upper kingpin 12 and lower kingpin 13 by the kingpin reinforcement plate 16 enhances the rigidity of the upper kingpin 12 and lower kingpin 13, improving the reliability of the entire system. The two upper swing arms 14 are connected to the upper kingpin 12 via bearings (which may be rolling bearings or sliding bearings) and upper swing arm pins 141. The upper kingpin 12 and upper swing arms 14 are capable of relative rotation about the upper swing arm pins 141. The lower swing arm 15 is connected to the lower kingpin 13 via a lower swing arm pin 151 and bearings (which may be rolling bearings or sliding bearings). The lower kingpin 13 and lower swing arm 15 are capable of relative rotation about the lower swing arm pins 151. The upper kingpin 12 and the lower kingpin 13 are connected to the steering knuckle 11 through bearings (the bearings can be rolling bearings or sliding bearings). The steering knuckle 11 can rotate around the kingpin. The kingpin reinforcement plate 16 connects the upper kingpin 12 and the lower kingpin 13 together to form a rigid whole, thereby improving the rigidity of the upper kingpin 12 and the lower kingpin 13, and improving the reliability of the kingpin bearing.

[0044] In this embodiment, the upper kingpin 12 has a horizontally disposed first pin hole 121 for mounting the upper swing arm 14. The upper kingpin 12 has a first kingpin shaft 122 for connecting to the upper pin hole 111 of the steering knuckle 11. The first kingpin shaft 122 is perpendicular to the first pin hole 121. The upper kingpin 12 has a first mounting hole 123 for mounting an elastic element. The lower end of the elastic element moves in the YZ plane in a manner consistent with the motion trajectory of the steering knuckle. The upper kingpin 12 has a first mounting surface 124 for connecting to the kingpin reinforcement plate 16. The first mounting surface 124 is provided with a plurality of first connection holes 125. Specifically, the upper kingpin 12 comprises a cylindrical body with the first pin hole 121 defined therein. Below the cylindrical body is the first kingpin shaft 122, which is a cylindrical segment. One side of the cylindrical body is connected to a mounting body, and both sides of the mounting body form the first mounting surfaces 124. The first connection holes 125 are defined on the first mounting surface 124. A first mounting hole 123 is defined on the upper surface of the mounting body. The lower kingpin 13 has a horizontally disposed second pin hole 131 for mounting the lower swing arm 15. The lower kingpin 13 has a second kingpin shaft 132 for connecting to the lower pin hole 112 of the steering knuckle 11. The second kingpin shaft 132 and the second pin hole 131 are perpendicularly disposed, and the lower and upper pin holes are coaxially disposed. The lower kingpin 13 has a second mounting hole 133 for mounting a shock absorber. The lower kingpin 13 has a second mounting surface 134 for connecting to the kingpin reinforcement plate 16. A plurality of second connection holes 135 are disposed on the second mounting surface 134. Specifically, the upper kingpin 13 is provided with a cylindrical body with a second pin hole 131 formed therein. A second kingpin shaft 132 is provided in front of the cylindrical body. The second kingpin shaft 132 is a cylindrical segment structure. The rear side of the cylindrical body is connected to a mounting body. The mounting body has second mounting surfaces 134 on both sides, and a second connection hole 135 is provided on the second mounting surface 134. A second mounting hole 133 is provided on the concave surface of the mounting body. Kingpin reinforcement plates 16 are provided on both sides of the upper kingpin 12 and the lower kingpin 13. Specifically, the kingpin reinforcement plate 16 is an L-shaped structure, with the short side connected and fixed to the first mounting surface 124 of the upper kingpin 12 and the end of the long side connected and fixed to the second mounting surface 134 of the lower kingpin 13.

[0045] The left wheel drive system 1 and the right wheel drive system 2 described in this embodiment both further include a motor 17, a speed reducer 19, a wheel hub assembly 18, and a brake 23. The wheel hub assembly 18 is mounted on the steering knuckle 11. The motor 17 is connected to the speed reducer 19, which is fixedly connected to the steering knuckle 11. The speed reducer 19 is connected to the wheel hub via a half shaft 20 to achieve power transmission. The motor 17 and speed reducer 19 are arranged in the space between the upper kingpin 12 and the lower kingpin 13. The brake 23 is fixed to the steering knuckle 11 and cooperates with the brake disc on the wheel hub to achieve braking. Specifically, the motor 17 is connected to the speed reducer 19 via bolts and splines, and the speed reducer 19 is connected to the steering knuckle 11 via bolts. The wheel hub assembly 18 is mounted on the steering knuckle 11 via a bearing and locked with a nut. The brake 23 is fixed to the steering knuckle 11 via bolts and splines and cooperates with the brake disc on the wheel hub to achieve braking. The driving torque of motor 17 is transmitted via splines to reducer 19, which in turn transmits it to axle shaft 20 via splines. Axle shaft 20 is bolted to the wheel hub to achieve power transmission. Motor 17 is equipped with an interface 171 for diagonally upward cable exit. This diagonally upward cable exit method reduces the enveloping space of the motor's three wiring harnesses during steering.

[0046] The steering knuckle 11 of this embodiment is provided with a reinforcement plate 21 for increasing the rigidity of the steering knuckle 11, thereby enabling the steering knuckle 11 to bear a larger load. Specifically, the reinforcement plate 21 is mounted on the steering knuckle 11 via bolts, thereby increasing the rigidity of the steering knuckle 11, thereby enabling the steering knuckle 11 to bear a larger load.

[0047] The left wheel drive system 1 and the right wheel drive system 2 described in this embodiment also include a liquid storage tank 22, which is installed on the reinforcing plate 21 by bolts. The liquid storage tank 22 is connected to the reducer 19 through an oil pipe and is installed above the installation position of the reducer 19, which can effectively prevent the escape of oil and gas.

[0048] The reducer 19 described in this embodiment includes a case cover 191, a gear frame 192, a driving wheel 193, a driven wheel 194, a sun gear 195, a planetary gear 196, a planetary gear shaft, a planetary carrier 197, and an inner ring gear 198. The driving wheel 193 and the driven wheel 194 are both mounted on the case cover 191 and the gear frame 192 through bearings. The driving wheel 193 and the driven wheel 194 are meshed and connected. The sun gear 195 is connected to the driven wheel 194 through a spline. The planetary carrier 197 is mounted on the driven wheel 194 through a bearing. The planetary gear 196 is mounted on the planetary carrier 197 through a planetary gear shaft and a bearing. The planetary gear 196 is meshed with the sun gear 195. The inner ring gear 198 is fixed to the steering knuckle 11 by bolts. The planetary gear 196 is also meshed with the inner ring gear 198, driving the planetary carrier 197 to rotate. The planetary carrier 197 is connected to the half shaft 20 through a spline to transmit power to the wheel side.

[0049] In this embodiment, two upper swing arms 14 are provided, both mounted within the first pin hole 121 of the upper kingpin 12 via an upper swing arm pin 141. The upper swing arm 14 includes a swing arm 142, which is connected to the upper swing arm pin 141 via a combined elastic bushing. The combined elastic bushing includes an elastic bushing 143, which is press-fitted into the swing arm hole. The upper swing arm pin 141 is mounted within the inner hole of the elastic bushing 143 via a bearing, with an oil seal 144 disposed between the upper swing arm pin 141 and the elastic bushing 143. An oil passage 145 for lubricating the bearing is provided on the upper swing arm pin 141. The swing arm 142 can rotate freely about the swing arm pin, avoiding the problem of significant rotational restrictions associated with conventional bushings.

[0050] The present invention distributes the upper and lower kingpins 12 and 13, creating space between them for the motor 17 and reducer 19. This allows for steering while integrating the drive system, reducing system footprint and weight. By connecting the upper and lower kingpins 12 and 13 into a single unit at the kingpin reinforcement plate 16, the kingpin's rigidity and the reliability of the kingpin bearing are enhanced, enabling an independent suspension with steering functionality to achieve a load capacity exceeding 9 tons. The arrangement of the steering rocker arm 6, the steering intermediate tie rod 7, and the steering tie rod 5 enables left and right wheel steering while satisfying the Ackerman angle relationship. The upwardly slanted arrangement of the three-phase output cables of the motor 17 reduces the envelope required for three-phase steering, enabling distributed drive with steering. The dual airbags and their mounting on the kingpin via airbag arms ensure that the airbag mounting points primarily move vertically, resulting in minimal swing, thus improving load capacity. This also allows for a shorter upper swing arm 14, increasing the width of the channel between the left and right upper swing arms 14. The provision of the reinforcing plate 21 increases the rigidity of the steering knuckle 11 by providing the reinforcing plate 21 at the steering knuckle, so that the system has a higher load-bearing capacity, and the load-bearing capacity can be ≥9 tons. The provision of the liquid storage tank 22 is achieved by providing the liquid storage tank 22 to be connected to the reducer 19. When the reducer 19 is heated and exhausted, the oil and gas enter the higher-positioned liquid storage tank 22 through the oil pipe. Since the liquid storage tank 22 is located at a higher position and is farther away from the reducer 19, the oil and gas condense after hitting the wall of the liquid storage tank after entering. The oil flows back through the oil pipe, effectively preventing the oil and gas from escaping. The integrated reducer 19 integrates a single-stage parallel shaft reducer and a planetary gear reducer, which effectively reduces the size of the reducer. According to the steering knuckle structure optimized by finite element analysis, the steering structure is subjected to finite element analysis according to the force, and different reinforcing ribs are provided to reduce the weight while ensuring the structural strength and rigidity. The combined bushing structure of the upper swing arm allows the upper swing arm to rotate around the pin shaft as a set without angle restriction, making it possible to shorten the distance between the two pin holes of the upper swing arm, thereby effectively increasing the channel width between the left and right upper swing arms of the entire system.

Claims

1. A double wishbone independent suspension distributed drive steering axle, comprising a left wheel side drive system and a right wheel side drive system that are bilaterally symmetrical, wherein the left wheel side drive system and the right wheel side drive system each comprise a steering knuckle, an upper kingpin and a lower kingpin, the upper kingpin being mounted on the upper part of the steering knuckle and used for mounting an upper swing arm, the lower kingpin being mounted on the lower part of the steering knuckle and used for mounting a lower swing arm; two air bags that withstand vertical force are mounted on each of the upper kingpins; a steering knuckle arm is mounted on the lower part of each steering knuckle, the steering knuckle arm being connected to a steering rocker arm through a steering tie rod, each steering rocker arm being rotatably connected to a vehicle body, the left steering rocker arm and the right steering rocker arm being connected through a steering intermediate rod to form a steering trapezoidal structure; a shock absorber is mounted on each of the lower kingpins; the left lower swing arm and the right lower swing arm are connected through a stabilizer bar.

2. The double wishbone independent suspension distributed drive steering axle according to claim 1, characterized in that: After being mounted on the steering knuckle, the upper kingpin and the lower kingpin are connected via the kingpin reinforcement plates on both sides to form an integral structure.

3. The double wishbone independent suspension distributed drive steering axle according to claim 2, characterized in that: The upper kingpin has a horizontally arranged first pin hole for installing the upper swing arm; the upper kingpin has a first kingpin shaft for connecting with the upper pin hole of the steering knuckle, and the first kingpin shaft and the first pin hole are arranged vertically; the upper kingpin has a first mounting hole for installing an elastic element, and the movement trajectory of the lower end of the elastic element in the YZ plane is consistent with the movement trajectory of the steering knuckle; the upper kingpin has a first mounting surface for connecting with the kingpin reinforcement plate, and a plurality of first connecting holes are arranged on the first mounting surface.

4. The double wishbone independent suspension distributed drive steering axle according to claim 3, characterized in that: The lower kingpin has a horizontally arranged second pin hole for installing the lower control arm; the lower kingpin has a second kingpin shaft for connecting with the lower pin hole of the steering knuckle, the second kingpin shaft and the second pin hole are vertically arranged, and the lower pin hole and the upper pin hole are coaxially arranged; the lower kingpin has a second mounting hole for installing the shock absorber; the lower kingpin has a second mounting surface for connecting with the kingpin reinforcement plate, and a plurality of second connecting holes are arranged on the second mounting surface.

5. The double wishbone independent suspension distributed drive steering axle according to claim 1, characterized in that: The left wheel drive system and the right wheel drive system both include a motor, a reducer, a wheel hub assembly, and a brake. The wheel hub assembly is installed on the steering knuckle, the motor is connected to the reducer, and the reducer is fixedly connected to the steering knuckle. The reducer is connected to the wheel hub through a half-shaft to realize power transmission. The motor and the reducer are arranged in the space between the upper kingpin and the lower kingpin; the brake is fixed on the steering knuckle, and the brake cooperates with the brake disc on the wheel hub to realize the braking function.

6. The double wishbone independent suspension distributed drive steering axle according to claim 5, characterized in that: The motor is provided with an interface for outputting wires obliquely upwards.

7. The double wishbone independent suspension distributed drive steering axle according to claim 5, characterized in that: A reinforcing plate for improving the rigidity of the steering knuckle is installed on the steering knuckle.

8. The double wishbone independent suspension distributed drive steering axle according to claim 7, characterized in that: The left wheel drive system and the right wheel drive system both further include a fluid storage tank, which is mounted on a reinforcing plate. The fluid storage tank is connected to the reducer via an oil pipe and is mounted higher than the installation position of the reducer.

9. The double wishbone independent suspension distributed drive steering axle according to claim 5, characterized in that: The reducer includes a case cover, a gear frame, a driving wheel, a driven wheel, a sun gear, planetary gears, a planetary gear shaft, a planetary carrier, and an inner ring gear. The driving wheel and the driven wheel are both installed on the case cover and the gear frame. The driving wheel and the driven wheel are meshed and connected. The sun gear is connected to the driven wheel. The planetary carrier is installed on the driven wheel. The planetary gears are installed on the planetary carrier through the planetary gear shaft. The planetary gears are meshed with the sun gear. The inner ring gear is fixed on the steering knuckle. The planetary gears are meshed with the inner ring gear to drive the planetary carrier to rotate. The planetary carrier is connected to the half shaft.

10. The double wishbone independent suspension distributed drive steering axle according to claim 1, characterized in that: There are two upper swing arms, both of which are installed in the first pin hole of the upper kingpin through the upper swing arm pin shaft. The upper swing arm includes a swing arm, and the swing arm and the upper swing arm pin shaft are connected through a combined elastic bushing. The combined elastic bushing includes an elastic bushing, and the elastic bushing is pressed into the swing arm hole. The upper swing arm pin shaft is installed in the inner hole of the elastic bushing and an oil seal is provided between the elastic bushing. The upper swing arm pin shaft is provided with an oil channel for lubricating the bearing.

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